John I. Leonard Community High School is a public high school located in Greenacres, Florida, United States.

The high school is named after John I. Leonard, who served as the first president of Palm Beach State College (then Palm Beach Junior College) and as Palm Beach County superintendent of public schools from 1936 to 1947.

[3] On August 7, 1964, Melvin J. Adolphson was named as the first principal of the new high school,[4] which opened in 1965.

[3] In January 1994, the school was annexed into the city of Greenacres.

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